Respirator



7 R MALCU RESPIRATOR Filed Dec. 15 1920 Patented May 1, 1923.

n all UNITEDSTA ROBERT Marcella or CHICAGO, :rnnrnrcrs.

RESRIBATOR.

, App1ication filed December 15, 1929. Serial No. 130,865.

To all "whom it may concern:

iii

Be it knowuthat 1,]Ronnnr MALcoM, a citizen of the United States, residing at Chicago, Cook County, Illinois, have 1n- ,lvented certain new, and. useful Improvements in Respirators, of which the following, taken in connection with the drawing, isia description. i

My invention has for its ob ect the production of an improved form of respirator designed to cover the nose and mouth of the wearer and prevent theinhalation of dust, smoke or other extraneous matter.

Another object is to provide a respirator which will be of simple construction, cheap to manufacture, and effective for the purpose.

The particular object of my invention is to provide a novel construction 011 means for securing the filter medium to the body portion of the respirator, which can be assembled in a single operation, and wherein the bodyportion of the respirator which may consist of leather, rubber, or any other suitable material, is held in place by frictional engagement between two concentric rings, which rings are rigidly secured by a third member which also forms a seat for the filter medium without any extra parts i or fastenings being employed for the purpose. i A further object of my invention is to provide means for securing same to the head of the wearer whereby the respirator may be easily adjusted to different sized heads, and also whereby the head band'may be quickly and readily changed for renewal. purposes, etc. v Further objects and advantages of my invention will. appear hereinafter, and in the accompanying drawings I have illustrated what I now consider the preferred form of my invention, though it is obvious eertain modifications may be made without departing from the spirit thereof, and in these drawings Figure 1 is a top plan view of my inven tion,

Figure 2 is aside elevation of same, Figure 3 is i a vertical sectional view of my invention,

,l raure e is a perspective view or one or the respirator is the concentric rings used in this construction and i Figure 5 ing rim. i i i i Referring to the drawings 6 represents what I shalltermthc body portion of the respirator, which may be formed of leather,

rubber, or any other material suitable for the purpose.

isa perspr-zrtive view of the hold- 7 and 8 are holding rings positioned concentrically with respect to each other and receive between them the material formi ing the body portion of the respirator, as

shown in Figure 3. The body portion 6, of held in place through frictional engagement with the concentric rings 7 and 8.

Each oi" the rings 7 and 8 is provided with an inwardly extending flange 910, respectively. The rings 7 and 8 are locked in positive engagement with each other by means of the ,circumferentially extending holding member, .11, which forms a seat for the filter medium, 12. The member 11 is provided with a circumferential shoulder '13, on which is seated the lowermost ring 7. The tubular portion 14, which extends upwardly through the rings 7 and 8 is bent over to positively engage the flanges 9 and 10 as shown in Figure This can be accomplished in a single operation. preferably by stampingor pressing. without any extra parts or tastenings being employed for the purpose. K v The filter 12 may be of anv type known 1n the art, depending on the use to which the respirator is to be put.

The filter 12 is held in place by means Off,

the retaining ring, 15, which is threaded to engage the member 11 as shown in Figure 3. The fore edge of this retaining ring 15 bent inwardly and contacts with the filter 152 to hold it against the flange or shoulder 13. It will be obvious that this construction permits the filter medium to be quickly and easily removed. by unscrew ing the retaining ring, 15, for the purpose of exchanging same or for any other reason.

The binding 16 may be secured around the edges cont-acting with the face of the wearer if desired, and may beformed of rubber, felt, or any other suitable materiall In this instance I have shown the binding secured to the respirator by stitching, although it is obvious it may be done in any other manner well known in the art.

17 is a headband, formed preferably of elastic material, by means of which the respirator is secured to the head of the wearer, and is so fastened that it can be removed when desired.

I claim 1. A respirator comprising a body portion of flexible material adapted to be secured to the face, rings concentrically arranged with respect to each other engaging one edge of said body portion, means for engaging the inner edge of said rings and forming a shoulder, a filter member, and a retainingmember engaging said means and holding said filter in place.

2. A respirator comprising a body portion having a circular opening at the for- A rings having an inwardly extending flange,

a retaining member having a tubular portion extending through said rings and adapted to be bent in frictional engagement with said flanges, a filter in said retaining member, means for holding said filter in place, and a ren'iovable, adjustable headband secured to said respirator.

In testimony whereof I have signed this specification.

ROBERT MALCOM. 

